Charlatans and Quacks

"THE argument used by professional men of science that what they call quack remedies are superstitions is really an argument in a circle. It amounts to this, that the herbs used by an old woman are untrustworthy because she is superstitious; and she is superstitious because she believes in such herbs. Her method is bad because she is stupid; but the main proof of her stupidity is that she pursues her own method."

~G.K. Chesterton: Illustrated London News, Feb. 15, 1908.